TX-8470 Troubleshooting: Power and Audio

Power
The unit turns off unexpectedly
• If "2. Control" - "Auto Standby" on the Setup menu is activated, the unit automatically enters the standby mode.
• The protection circuit function may have operated due to an abnormal rise in temperature of the unit. In such a case, the power turns off
repeatedly even if the power is turned on each time. Secure sufficient ventilation space around the unit, wait for a while until the temperature of the unit decreases. Then, turn the power on again.
WARNING: If smoke, smell or abnormal noise is produced by the unit, unplug the power cord from the outlet immediately, and contact the dealer or our company's support.  ( →p80)
Audio
• Confirm that the connection between the output jack on the connected device and the input jack on this unit is correct.
• Make sure that none of the connecting cables are bent, twisted, or damaged.
• If "MUTING" is displayed on the display and MUTE is blinking, press the MUTING button on the remote     controller to cancel muting.
• While headphones are connected to the PHONES jack, no sound is output from the speakers.
   Check the following if the problem persists after you have confirmed the above.
No sound from the TV
• Change the input selector on this unit to the position of the terminal to which the TV is connected.
• If the TV doesn't support the ARC function, along with connection by HDMI, connect the TV and this        unit using a digital optical cable or analog audio cable.( →p24)
No sound from a connected player
• Change the input selector on this unit to the position of the jack to which the player is connected.
• Check the digital audio output setting on the connected device. On some game consoles, such as those     supporting DVD, the default setting may  be off.
• For some DVD-Video discs, you need to select an audio output format from a menu.
Speakers produce no sounds
• Make sure that the polarity (+/-) of the speaker cables is correct, and that no bare wires are in contact       with the metal part of speaker terminals.
• Make sure that the speaker cables are not shorting out.
• Check "Connect the Speaker Cables" ( →p18) to see if the speaker connections have been made                 correctly.

Noise can be heard
• Using cable ties to bundle analog audio cables, power cords, speaker cables, etc. may degrade the             audio performance. Do not bundle the cords.
• An audio cable may be picking up interference. Change the position of the cables.
The beginning of audio received by an HDMI IN cannot be heard
• Since it takes longer to identify the format of an HDMI signal than it does for other digital audio                 signals, audio output may not start immediately.
Sound suddenly reduces
• When using the unit for extended periods with the temperature inside the unit exceeding a certain             temperature, the volume may be reduced automatically to protect the circuits.